Device to prevent slipping.



A. KASZUBSKI.

DEVICE TO PREVENT SLIPPING.

APPLICATION FILED AUG,7,1914.

1,142,967, Patented June 15, 1915.

jfl'g Snow W01 THE NORRIS FETERS CO PHQTO-LITHQ, WASHINGTON. D. c,

- sleety pavements,

ADAM KASZUBSKI, OF DETROIT, MICHIGAN.

DEVICE TO PREVENT SLIFIPING.

Specification of Letters Patent.

Application filed August 7, 1914. SerialNo. 855,592.

To all whom it may concern Be it known that I, ADAM KAsZUBsKI, a subject of the Czar of Russia, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Device to Prevent Slipping, of which the following is a specification.

This invention relates to means for preventing pedestrians from slipping on icy or and its ob ect is to provide an easily attached and detached antislipping device which shall be strong and which shall have spikesthat will engage with the ice on pavements, and which spikes I? will yield when impenetrable surfaces are walked upon.

This invention consists of a frame, anovel gripping device for securing the frame to one edge of a shoe sole, and spring-held spikes movably mounted in the frame.

This invention also consists in forming the gripping device of a thin plate of spring steel having a serrated downturned end adapted to be forced into engagement with the edge of a shoe sole by means of a small cam.

It further consists in mounting this cam on the same piece of spring wire whose ends constitute the spikes.

It further consists in the details of construction illustrated in the accompanying drawing and particularly pointed out in the claims.

In the accompanying drawing, Figure 1 is a perspective view of this anti-slipping device secured to a shoe sole. Fig. 2 is an elevation thereof. Fig. 3 is a vertical section just at the left of the part 17 and at right angles to the plane of Fig. 2. Fig. 4 is a perspective view of the gripping spring. Fig. 5 is a plan of the frame.

Similar reference characters refer to like parts throughout the several views.

The frame of this device consists of a plate 1 having upwardly extending points 2 to engage the bottom of the sole 3 to which this device is to be attached, and two posts 4 having transverse holes near their upper ends to receive the rod 5. Shoulders 6 on these posts at the plate 1 have holes 7 to permit the spikes 8 to move up and down therein, these spikes being connected to the rod 5 by means of the loops 9, all being made of the same piece of spring steel. A flat spring 11 is secured at one end to the plate 1, preferably by a rivet 12. The spring extends between the posts 4, being held down by small ribs 13 on these posts. The outer end of the spring is then bent back and its serrated free end 15 bent down. A lever 16 is mounted on the rod 5 between the posts and has a shoulder 17 which is adapted to force the serrated end 15 of the spring from the position shown in solid lines in Fig. 3 to that shown in dotted lines, when the lever is swung to dotted line position.

When the device is to be attached to a sole, the lever 16 is swung up and the plate is laid against the bottom of the sole with the posts 4 resting against the edge thereof.

This causes the downturned serrated end 15 of the spring to extend over the edge of the sole. The lever 16 is then swung down, causing the shoulder 17 to force the teeth of the end 15 into the sole, securely holding this device in position. When stepped upon, the points 2 will enter the lower side of the sole and assist in holding the device in position.

The spikes 8 normally extend below the plate 1 and are held in that position by the loops 9. But if the wearer steps onto anything harder than ice, such as stone or brick pavements, the loops will permit the spikes to be forced up, thus not only preventing excessive wear, but also doing away with the discomfort of walking on these spikes.

While the design shown has proven to be the most desirable, this invention is not limited thereto, for the details and proportions may all be changed without departing from the spirit of my invention as set forth in the following claims.

I claim 1. In a device for preventing pedestrians from slipping, the combination of a plate adapted to extend below the sole of-a shoe, upwardly extending posts at its outer end, which posts have transverse holes at their upper ends and lugs at the outer sides of their lower ends provided with vertical holes, a wire rod extending through said transverse holes and having its ends extending down through the vertical holes, its intermediate portions constituting resilient loops, a flat spring secured at one end to said plate and extending out between the posts and then bent back between the posts with its end serrated and bent downwardly, and a lever mounted on the rod between the Patented June 15 1915.

tween the posts with its end serrated and bent downwardly, and a lever mounted on the rod between the posts to force the serrated end of the spring into engagement I with the sole.

3. In a device for preventing pedestrians from slipping, the combination of a plate adapted to extend below the sole of a shoe, upwardly extending posts at its outer end, which posts have transverse holes at their upper ends and lugs at the outer sides of their lower ends provided with vertical holes, a wire rod extending through said transverse holes and having its ends extending down through the vertical holes in the lugs, its intermediate portions constitu ing resilient loops, and means to secure the plate to the sole.

&. In a device for preventing pedestrians from slipping, the combination of a plate adapted to extend below the sole of the shoe and projections thereon, a flat spring secured at one end to said plate between the projections, said plate being bent back upon itself and then downwardly and being serrated at its end, and means for forcing the serrated end into the upper surface of the sole.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ADAM KASZUBSKI.

WVitnesses:

HUGO W. KREINBRING, L. M. SPENCER.

G'opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C." 

